<template>
    <div class="login_container">
        <!-- 登录块 -->
        <div class="login_box">
            <!-- 头像 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 表单 -->
            <el-form ref="LoginFormRef" :model="loginForm" label-width="0" :rules="LoginFormRules" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="el-icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password"></el-input>
                </el-form-item>
                <!-- 按钮 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
    export default {
        data() {
            return {
                //表单数据对象
                loginForm: {
                    username: '',
                    password: ''
                },
                //验证对象
                LoginFormRules: {
                    username: [
                        {required: true, message: '请输入用户名', trigger: 'blur'},//必填项验证,失去焦点事件
                    ],
                    password: [
                        {required: true, message: '请输入密码', trigger: 'blur'},
                    ]
                }
            }
        },
        methods: {
            //重置表单内容
            resetLoginForm() {
                this.$refs.LoginFormRef.resetFields()
            },
            //处理登录方法
            login() {
                //验证校验规则
                this.$refs['LoginFormRef'].validate(async (valid) => {
                    if (valid) {
                        let data = {
                            password: this.loginForm.password,
                            rememberMe: true,
                            username: this.loginForm.username
                        }
                        await this.$http.post('/auth/authenticate', data)
                            .then((res) => {
                              this.$message({
                                message: '登录成功',
                                type: 'success'
                              })
                              window.sessionStorage.setItem('token', res.data.id_token)
                              this.$router.push('/home')//页面路由跳转
                            })
                            .catch(() =>{
                              this.$message({
                                message: '账号或密码错误',
                                type: 'error'
                              })
                            })
                    } else {
                        return false
                    }
                })
            }
        }
    }
</script>

<style lang="less" scoped>
//根节点样式；背景颜色全覆盖
    .login_container {
        background-color: #2b4b6b;
        height: 100%;
    }

    .login_box {
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;//绝对定位
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%)
    }

    .avatar_box {
        width: 130px;
        height: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: #fff;

        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }

    .login_form {
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 20px;
        box-sizing: border-box;
    }

    .btns {
        display: flex;
        justify-content: flex-end;
    }
</style>>

